The episode’s central conflict revolves around a series of explosive rampages orchestrated by a vengeful bomber. Officers (played by Nathan Fillion ) and his rookie, Celina Juarez , find themselves at the center of the crisis when they encounter a victim trapped in a literal "collar bomb".
: Celina’s unconventional investigative style proves vital when she deduces that the bomber’s instructions are a trap designed to trigger the explosion. Her quick thinking allows Nolan to cut the correct wire, saving the victim's life. Major Character Developments "The Rookie" The Collar(2022)
While the bomb threat drives the plot, the episode is equally famous among fans for its major relationship milestones: The episode’s central conflict revolves around a series